Coke oven adopting oxygen-enriched combustion

Abstract

The utility model relates to a coke oven adopting oxygen-enriched combustion, which comprises an oxygen production membrane component, and the oxygen production membrane component is arranged in a heat storage chamber of the coke oven and is arranged in a grid form. The oxygen production membrane assembly comprises a framework and an oxygen production membrane, the framework is fixedly connected with the heat storage chamber of the coke oven, and the oxygen production membrane is supported and fixed by the framework. The coke oven has the advantages that a device capable of supplying oxygen is additionally arranged in the coke oven, a coking unit and an oxygen generation unit are integrated, the occupied area of an oxygen supply system is reduced, the construction cost is low, and the equipment investment is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of coking production, and particularly relates to a coke oven adopting oxygen-enriched combustion. Background Art

[0002] In the traditional coking system, air is used as the combustion-supporting gas. Air and coal gas are mixed and burned in the combustion chamber. After the combustion, the waste heat of the exhaust gas is recovered in the coke oven regenerator and discharged into the atmosphere through the chimney. There are disadvantages such as high nitrogen oxide and carbon dioxide content in the exhaust gas and large exhaust loss. Therefore, it is proposed to apply oxygen-enriched combustion technology to coke oven heating.

[0003] In the prior art, Patent Publication No. CN113845942A discloses a coking and flue gas treatment system and method; Patent Publication No. CN21723581U discloses a coke oven heating system using oxygen-enriched combustion. Both of them propose a coking system and a heating system using oxygen-enriched combustion, but both of them use an oxygen supply unit or an oxygen-enriched gas pipeline as the source of oxygen. For coking enterprises that originally do not have an oxygen pipeline network, it is necessary to establish an additional oxygen supply system. In addition to increasing the additional construction cost and land cost, new energy consumption also occurs, namely the energy consumption generated by oxygen production. Summary of the invention

[0004] The utility model aims to provide a coke oven adopting oxygen-enriched combustion, in which an oxygen production device heating method is arranged inside the coke oven, no additional oxygen supply system is required, the area occupied is small, and the heat exchange efficiency is improved.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A coke oven adopting oxygen-enriched combustion comprises an oxygen-generating membrane assembly, which is arranged in a heat storage chamber of the coke oven and arranged in a grid form.

[0007] The oxygen production membrane assembly comprises a frame and an oxygen production membrane. The frame is fixedly connected to the heat storage chamber of the coke oven, and the oxygen production membrane is supported and fixed by the frame.

[0008] The oxygen-generating membrane is supported by a skeleton to form a channel structure.

[0009] The oxygen-generating membrane is a carrier-facilitated transfer membrane, and its operating temperature is 400-600°C.

[0010] The oxygen-generating membrane is an ion transport membrane, and its working temperature is 600-900°C.

[0011] A plurality of air supply channels and oxygen-depleted gas exhaust channels are arranged in the heat storage chamber, and the openings at both ends of the oxygen-generating membrane assembly are respectively connected to the air supply channels and the oxygen-depleted gas exhaust channels.

[0012] The air supply channels and the oxygen-depleted gas exhaust channels are arranged in a row.

[0013] The oxygen-depleted gas discharge channel is communicated with the outside of the coke oven.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model adds an oxygen supply device in the coke oven, integrates the coking unit with the oxygen production unit, reduces the floor space of the oxygen supply system, and has low construction costs and reduces equipment investment.

[0016] 2. The utility model uses the high-temperature coke oven flue gas from the combustion chamber as the carrier gas for the oxygen production membrane assembly and provides the required energy for the oxygen production process, thereby improving the energy utilization efficiency and significantly reducing the oxygen production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a coke oven with oxygen-enriched combustion.

[0018] Figure 2 yes Figure 1 Section view along line AA.

[0019] Figure 3 yes Figure 1 Section view along line BB.

[0020] Figure 4 yes Figure 3 Cross-sectional view along line CC.

[0021] Figure 5 It is a schematic diagram of the connection between the oxygen production membrane assembly and the heat storage chamber.

[0022] Figure 6 It is a schematic diagram of the skeleton structure.

[0023] In the figure: 1-coke oven 2-combustion chamber 3-carbonization chamber 4-ramp 5-heat storage chamber 6-oxygen production membrane assembly 7-air inlet 8-air outlet 9-skeleton 10-oxygen production membrane 11-air supply channel 12-oxygen-depleted gas discharge channel 13-slide. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the accompanying drawings of the specification, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0025] See Figure 1-Figure 4A coke oven heated by oxygen-enriched combustion, wherein oxygen generated by an oxygen-generating membrane 10 is used as a combustion-supporting gas in the coke oven 1, wherein a plurality of combustion chambers 2 are arranged on the upper part of the coke oven 1, a carbonization chamber 3 is arranged between the combustion chambers 2, and the bottom of the combustion chamber 2 is connected to a regenerator 5 arranged at the lower part of the coke oven 1 through a ramp 4, and an oxygen-generating membrane assembly 6 is arranged in the regenerator 5 of the coke oven 1, and the oxygen-generating membrane assembly 6 is arranged in a grid form. The oxygen-generating membrane assembly 6 includes a skeleton 9 and an oxygen-generating membrane 10, wherein the skeleton 9 is fixedly connected to the regenerator 5 of the coke oven 1, the oxygen-generating membrane 10 is supported by the hollow skeleton 9, and the oxygen-generating membrane 10 is supported by the skeleton 9 to form a channel structure.

[0026] See Figure 6 The skeleton 9 can be composed of two upper and lower metal tubes arranged parallel to each other and a plurality of metal bar groups connected in the middle of the metal tubes. The metal bar groups are arranged parallel to each other. The oxygen-generating membrane 10 is wrapped around the outside of the metal bar group. The metal bar group can be composed of multiple metal bars, which are arranged in a cylindrical structure, and a sufficient distance is left between the metal bars to increase the contact area between the oxygen-generating membrane 10 and the air.

[0027] A plurality of air supply channels 11 and oxygen-depleted gas exhaust channels 12 are provided in the regenerator 5. The oxygen-generating membrane modules 6 are arranged in parallel with each other and with gaps therebetween. The openings at both ends of the oxygen-generating membrane modules 6 are respectively connected to the air supply channels 11 and the oxygen-depleted gas exhaust channels 12. The oxygen-depleted gas exhaust channels 12 are connected to the outside of the coke oven 1. The air supply channels 11 and the oxygen-depleted gas exhaust channels 12 constitute a channel structure, which is arranged in a row in the regenerator 5.

[0028] When the rising air flow passes through the heat storage chamber 5, the air blown in by the blower enters through the air supply channel 11, and the pressurized air enters the skeleton 9 from the air inlet 7 of the oxygen-producing membrane assembly 6. When the air flows through the oxygen-producing membrane assembly 6, the oxygen in the air passes through the oxygen-producing membrane 10 and enters the heat storage chamber 5, and is mixed with the rising air flow supplied to the heat storage chamber 5 to form a combustion-supporting gas. The remaining oxygen-depleted gas inside the skeleton 9 is discharged from the air outlet 8 of the oxygen-producing membrane assembly 6, and is discharged from the coke oven 1 after being collected in the oxygen-depleted gas discharge channel 12. The oxygen-depleted gas discharged from the coke oven 1 is sent to the heat recovery device for waste heat recovery.

[0029] When the downdraft passes through the heat storage chamber 5, the pressurized air stops being supplied to the oxygen-generating membrane 10, and the downdraft exhaust gas flows downward from the gaps between the oxygen-generating membrane modules 6 and heats the oxygen-generating membrane 10 to reach the optimal operating temperature.

[0030] The oxygen production membrane assembly 6 is placed at a corresponding height position in the heat storage chamber 5 according to the working temperature of the membrane. If the oxygen production membrane 10 adopts a carrier-facilitated transfer membrane, the working temperature is 400-600°C and is placed in the middle and lower part of the heat storage chamber 5. If the oxygen production membrane 10 adopts an ion transport membrane, the working temperature is 600-900°C and is placed in the middle and upper part of the heat storage chamber 5.

[0031] See Figure 5 A slide 13 is provided in the heat storage chamber 5, and the oxygen production membrane assembly 6 can be pulled out from one side or both sides of the heat storage chamber 5 through the slide 13 for replacement.

[0032] In the above embodiments, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have specific positions, or to be constructed and operated in specific positions.

[0033] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0034] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A coke oven using oxygen-enriched combustion, characterized in that: The invention comprises an oxygen production membrane assembly, which is arranged in a heat storage chamber of a coke oven and is arranged in a grid form.

2. A coke oven using oxygen-enriched combustion according to claim 1, characterized in that: The oxygen production membrane assembly comprises a frame and an oxygen production membrane. The frame is fixedly connected to the heat storage chamber of the coke oven, and the oxygen production membrane is supported and fixed by the frame.

3. A coke oven using oxygen-enriched combustion according to claim 2, characterized in that: The oxygen-generating membrane is supported by a skeleton to form a channel structure.

4. A coke oven using oxygen-enriched combustion according to claim 2, characterized in that: The oxygen-generating membrane is a carrier-facilitated transfer membrane, and its operating temperature is 400-600°C.

5. A coke oven using oxygen-enriched combustion according to claim 2, characterized in that: The oxygen-generating membrane is an ion transport membrane, and its working temperature is 600-900°C.

6. A coke oven using oxygen-enriched combustion according to claim 1, characterized in that: A plurality of air supply channels and oxygen-depleted gas exhaust channels are arranged in the heat storage chamber, and the openings at both ends of the oxygen-generating membrane assembly are respectively connected to the air supply channels and the oxygen-depleted gas exhaust channels.

7. A coke oven using oxygen-enriched combustion according to claim 6, characterized in that: The air supply channels and the oxygen-depleted gas exhaust channels are arranged in a row.

8. A coke oven using oxygen-enriched combustion according to claim 6, characterized in that: The oxygen-depleted gas discharge channel is communicated with the outside of the coke oven.

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